Choose Options Quick view Pulley 24-1270 208-12001 24-1270 MSRP: Now: $11.98 Was: PulleyReplace OEM(s): DelcoFor: Delco 12SI Series IR/EF AlternatorssUsed On: GMC Truck W/ Cummins 3.9L, 5.9L Diesel EngineBelt Width: 28mmCenter Of Rear Groove To Rear Of Pulley: 0.496in / 12... MSRP: Now: $11.98 Was: Choose Options Quick view